A few things I want: 6in rods, 1.6 rollers, internal balance and I want to keep my compression below 11.5:1.

Agree on keeping the CR a lot lower if this will be fed pump swill. If you're building an engine to run on race gas or E85, that's another thing altogether.

But at the target you have for power, there's no need to use race gas gas. Better to go w/around 9.5:1 CR like mentioned above that matches the cam you need to make the power you want. It's all interrelated.

By not pushing the limit on compression, you have a cushion against detonation caused by a bad tank of fuel or something causing the engine to run hotter than normal.